[Qgis-user] By default setting of raster transparency values

[Andreas Neumann]

As far as I understand the VRT, it is treated as a single image. So I
guess it isn't possible that each image has its own color stretching.

But, to be honest I am not an expert with VRTs.

Andreas


On Wed, December 16, 2009 3:56 pm, Agustin Lobo wrote:
> Good idea. In that case, would the color stretching
> be set globally as well? Or could each image
> keep its own?
>
> Agus
>
> Andreas Neumann wrote:
>> Hi Agus,
>>
>> how about building an image catalogue with .vrt ?
>>
>> See
>> http://geosauce.wordpress.com/2009/10/04/building-a-virtual-raster-tutorial/
>>
>> This way you only need to do the setting once.
>>
>> Andreas
>>
>>
>> On Wed, December 16, 2009 1:46 pm, Agustin Lobo wrote:
>>> Hi!
>>>
>>> I have a set of RGB geotif raster files
>>> for which I have to set 0,0,0 as transparent.
>>> As I have quite a number of them, setting
>>> this transparency is becoming tedious. Is there
>>> any way I could set this value for all of them at once?
>>> I've tried saving an style file, but this does not
>>> seem to work.
>>>
>>> Thanks
>>>
>>> Agus
>>>
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>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org
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>>>
>>
>>
>
>


-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/